Combined pressure and thermal safety valve



FIG. 1 is a perspective view taken from the front and side of a combined pressure and thermal safety valve showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is a side elevational view taken 90° to the side shown in FIG. 2, the opposite side being a mirror image of the side shown;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a combined pressure and thermal safety valve, as shown and described. 